Messages in this thread | | | From | "Kirill A. Shutemov" <> | Subject | [PATCH 0/3] Virtual huge zero page | Date | Sat, 29 Sep 2012 02:37:18 +0300 |
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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Here's alternative implementation of huge zero page: virtual huge zero page.
Virtual huge zero page is a PMD table with all entries set to zero page. H. Peter Anvin asked to evaluate this implementation option.
Pros: - cache friendly (not yet benchmarked); - less changes required (if I haven't miss something ;);
Cons: - increases TLB pressure; - requires per-arch enabling; - one more check on handle_mm_fault() path.
At the moment I did only sanity check. Testing is required.
Any opinion?
Kirill A. Shutemov (3): asm-generic: introduce pmd_special() and pmd_mkspecial() mm, thp: implement virtual huge zero page x86: implement HAVE_PMD_SPECAIL
arch/Kconfig | 6 ++++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 14 +++++++++++++- include/asm-generic/pgtable.h | 12 ++++++++++++ include/linux/mm.h | 8 ++++++++ mm/huge_memory.c | 38 ++++++++++++++++++++++++++++++++++++++ mm/memory.c | 15 ++++++++------- 7 files changed, 86 insertions(+), 8 deletions(-)
-- 1.7.7.6
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